30G OKDKK 122. CUPULIPER^E. 



7 Q. triloba MX. Downy Black- Jack. Tree of rapid growth, 20 -30f; leaves oblong- 



cuneiform, acute at base, rusty-tomentoua beneath ; lobes at apex often toothed, 

 bristle-pointed ; nut depressed. Barrens, N. J. to Fla. 



8 Q,. Catesbaei MX. Turkey 0. Tree 20 25f; leaves large, very irregular, glabrous, 



cnueate at base, lobes deep, narrow, with bristle-pointed, divaricate teeth ; cup large, 

 half covering tfcc ovoid, mealy nut. Barren?, South. 



9 <i Hiciielia Wang. Scrub 0. Bear 0. Shrub 3 7f, straggling ; Ivs. petiolate, obo- 



vate, angularly 5-(3-7-)lobed, 3 4', whitish-downy beneath ; acorn small (5 6"), cup 

 very shallow. Barren tracts : common. Animals feed on the acorns. 

 ft. (ieorg-fana. Leaves smaller and smoother, of the same form, on Stone Mt. ! 



10 Q. rubra L. J?ed 0. Tree 50 70f, wide and high ; leaves long-stalked, glabrous, 

 sinuses rounded, shallow, lobes 79. with bristle-pointed teeth ; acorn 1', ellipsoid, 

 J immersed in the shallow cup. Wood reddish, coarse : common. 



1 1 Q. pal icslris MX. Pin 0. (Figs. 1-4.) Sinuses deep and broad, lobes oftener 5. 

 petioles long (12'), toothed as in Q. rubra; acorns 7 S"; nut i immersed in the 

 cup. Tree GO SOf, with a light, open foliage, in wet, cool soils. 



12 Q. falcata L. Spanish 0. Tree 60 70f; Ivs. long-stalked, obtuse at base, ashy- 

 tomentous beneath, lobes 57, narrow, simple or toothed, more or less falcate ; acoru 

 globular, 4 5", in a shallow subsessile cup. Va. to Fla. 



13 Q. cocciiiea \Vang. Scarlet 0. Trees very large (SOf) ; Ivs. much like Q. rubra, 

 but changing to scarlet in Autumn, while that becomes red-brown ; acorn 7 8", nut 

 i f immersed in the cr.p. In young shoots the leaves almost lose their lobes and 

 teeth, but keep their bristles. Not rare. 



ft. linctoHa. Black 0. Leaves oftener obovate in outline ; bark black and bitter. 



1 4 Cfc. Leana N. Lea's 0. Leaves oblong, blunt at base, margin with a few angular, 

 very irregular lobes : acorn roundish, in a hemispherical cup. Rare. Ohio (Clark), 

 111. (Wolf). A hybrid ? but very constant. 



1 5 Q. alba L. White 0. (Fig. 339.) Lvs. short-petioled, acute at base, oblong, sinn- 

 ate-pinnatifid, lobes snbequal, obtuse ; acorn sessile ; nut oblong-ovoid, $ immersed 

 in the tubercled cup. Timber very useful. 



16 Q. obtusiloba MX. Iron 0. Post 0. Tree middle size, wide-spreading ; leaves 

 cuneiform at base, downy beneath, deeply sinuate, the 3 upper lobes dilated, each 2- 

 lobed ; nut oval, half immersed, sweet. Timber good. 



1 7 Q. macrocarpa MX. Moss-cup 0. (Figs. 340, 435.) Leaves deeply and lyrately 

 sinuate-lobed (most deeply in the middle) ; cup very deep, fringed with the pointed 

 scales, nut f or more immersed, I'. Common. W. and S. 



18 Q. lyrata Walt. Over-cup 0. Tree large ; leaves acute.at base, whitish beneath, 

 with 79 triangular acute lobes ; cup rugged with the scales, nearly or quite inclu- 

 ding the round nut. Swamps, S. 



19 Q. bicolor Willd. Swamp White 0. Tree handsome, 70f; leaves obovate, acute 

 and entire at base, white-downy beneath, with 9 or more obtuse teeth or lobes ; 

 acorns in pairs? on long (1 2') peduncles. Low woods. 



20 Q. Prinus L. Swamp Chestnut 0. Tree 50 70f, with large (!') sweet acorns; 

 leaves 47', obovate, crenate-undulate, downy beneath, with straight, strong veins ; 

 fruit peel, shorter than the petioles; nut I immersed. (Q. monticola.) 



ft. aruminata. Leaves oblanceolate, pointed, teeth sharp ; fruit subeessile. 

 y. priiioitteit. Shrub 3 4f; fruit crowded, sessile ; leaves small. 



2. CASTANEA, Tourn. CHESTNUT. Sterile flowers in long, slender 

 nments, fertile fls. few, 3 together, in an involucre. Cal. G-lobed or parted. 

 Sta. 820. 5 Ovaiy 3-G-celled, with as many stigmas. Fr. a prickly in- 

 volucre (bun), 4-valved, enclosing 13 coriaceous 1 -seeded nuts. ^ 5 

 Leaves acuminate, expanding before the flowers. Fig. 381. 

 1 C. vesoa L. Tree 50 SOf, with a large straight trunk. Lvg. 69' long, lancc-obicng, 



